第一个 DCMTK 程序：显示 DICOM 图像（DCMTK 3.6.4 + Qt 5.14.2 + VS2015）源码

#include "DicomView.h" #include <QGraphicsPixmapItem> #include <QGraphicsWidget> #include <QGraphicsLinearLayout> #include <QGraphicsProxyWidget> #include <QMessageBox> DicomView::DicomView(QWidget *parent) : QGraphicsView(parent) { _pScene = new QGraphicsScene(this); _pPixmapItem = new QGraphicsPixmapItem; _pWLValueItem = new QGraphicsSimpleTextItem; _pCurFrameItem = new QGraphicsSimpleTextItem; this->_seriesUID = ""; this->_pSeriesData = nullptr; this->_currImageIndex = 0; setFocusPolicy(Qt::StrongFocus); setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff); setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff); setContextMenuPolicy(Qt::DefaultContextMenu); setBackgroundBrush(QBrush(Qt::black)); setAcceptDrops(true); setFrameShape(QFrame::Box); setFrameShadow(QFrame::Plain); setAlignment(Qt::AlignCenter); setResizeAnchor(QGraphicsView::AnchorViewCenter); _pScene->setSceneRect(-5000, -5000, 10000, 10000); setScene(_pScene); //图片切换风格 _pPixmapItem->setTransformationMode(Qt::SmoothTransformation); _pPixmapItem->setAcceptHoverEvents(true); _pWLValueItem->setBrush(Qt::white); _pCurFrameItem->setBrush(Qt::white); _pScene->addItem(_pPixmapItem); _pScene->addItem(_pWLValueItem); _pScene->addItem(_pCurFrameItem); _pGraphicsSlider = new QGraphicsWidget; QGraphicsLinearLayout *pVerticalLayout = new QGraphicsLinearLayout; pVerticalLayout->setOrientation(Qt::Vertical); pVerticalLayout->setSpacing(0); _pGraphicsSlider->setLayout(pVerticalLayout); _pScene->addItem(_pGraphicsSlider); _pSlider = new QSlider; _pSlider->setMinimum(0); _pSlider->setOrientation(Qt::Vertical); _pSlider->setAttribute(Qt::WA_StyledBackground, true); _pSlider->setStyleSheet("background-color: rgba(200,200, 200,0)"); connect(_pSlider, SIGNAL(valueChanged(int)), this, SLOT(setCurFrameItem(int))); _pProxyWidget = _pScene->addWidget(_pSlider); QGraphicsLinearLayout *verticalLayout = (QGraphicsLinearLayout *)_pGraphicsSlider->layout(); verticalLayout->addItem(_pProxyWidget); } DicomView::~DicomView() { delete _pGraphicsSlider; delete _pCurFrameItem; delete _pWLValueItem; delete _pPixmapItem; delete _pScene; } void DicomView::loadSeries(QString &seriesUID) { SeriesData* pSeriesData = nullptr; for (size_t i = 0; i < SeriesData::SeriesList.size(); i++) { if (SeriesData::SeriesList.at(i)->getSeriesUID() == seriesUID) { pSeriesData = SeriesData::SeriesList.at(i); } } if (nullptr == pSeriesData) { QMessageBox::critical(this, QStringLiteral("加载错误"), QStringLiteral("序列不存在。")); return; } if (pSeriesData->images.size() == 0) { return; } this->_seriesUID = seriesUID; this->_pSeriesData = pSeriesData; this->_currImageIndex = 0; double xSpacing = 0, ySpacing = 0, zSpacing = 0; if (pSeriesData->images.values().at(this->_currImageIndex)->getPixSpacing(xSpacing, ySpacing, zSpacing)) { if (xSpacing > 0.000001 && ySpacing > 0.000001) { double psX = xSpacing; double psY = ySpacing; _fixFactor = psY / psX; } } _pSlider->setMaximum(_pSeriesData->images.size() - 1); _pSlider->setValue(_currImageIndex); double winWidth, winCenter; _pSeriesData->getDefaultWindow(winCenter, winWidth); _pWLValueItem->setText(tr("W:%1, L:%2").arg(winWidth).arg(winCenter)); _pPixmapItem->setPos(0, 0); _pPixmapItem->setRotation(0); _pPixmapItem->resetTransform(); updateView(); _pScene->update(_pScene->sceneRect()); } void DicomView::updateView() { if (nullptr == _pSeriesData) { return; } QPixmap pixmap; if (_pSeriesData->images.size() > this->_currImageIndex && _pSeriesData->images.values().at(this->_currImageIndex)->isNormal()) { double winWidth, winCenter; _pSeriesData->getDefaultWindow(winCenter, winWidth); _pSeriesData->images.values().at(this->_currImageIndex)->setWindow(winCenter, winWidth); _pSeriesData->images.values().at(this->_currImageIndex)->getPixmap(pixmap); _pPixmapItem->setPixmap(pixmap); _pPixmapItem->setTransformOriginPoint(_pPixmapItem->boundingRect().center()); _pCurFrameItem->setText(tr("%1 / %2").arg(_currImageIndex + 1).arg(_pSeriesData->images.size())); } else { _pPixmapItem->setPixmap(pixmap); _pCurFrameItem->setText(""); _pWLValueItem->setText(""); } resizePixmapItem(); repositionAuxItems(); } void DicomView::resizePixmapItem() { if (!_pPixmapItem->pixmap().isNull()) { QRectF pixmapRect = _pPixmapItem->boundingRect(); QRectF viewRect = this->rect(); double factor; if (pixmapRect.width()*viewRect.height() < pixmapRect.height()*_fixFactor*viewRect.width()) factor = viewRect.height() / (pixmapRect.height()*_fixFactor); else factor = viewRect.width() / pixmapRect.width(); _pPixmapItem->setTransform(QTransform(factor, 0, 0, factor*_fixFactor, 0, 0)); centerOn(_pPixmapItem); } } void DicomView::repositionAuxItems() { QPointF sceneTL = mapToScene(rect().topLeft()); QPointF sceneBR = mapToScene(rect().bottomRight()); _pCurFrameItem->setPos(sceneBR.x() - 60, sceneTL.y() + 20); _pGraphicsSlider->setPos(sceneBR.x() - 58, sceneTL.y() + 58); QSizeF slider_size(58, sceneBR.y() - sceneTL.y() - 116); _pGraphicsSlider->resize(slider_size); _pWLValueItem->setPos(sceneTL.x() + 10, sceneBR.y() - 30); } void DicomView::resizeEvent(QResizeEvent *event) { resizePixmapItem(); repositionAuxItems(); } void DicomView::wheelEvent(QWheelEvent *event) { QPoint delta = event->angleDelta(); if (_pSeriesData == nullptr || _pSeriesData->images.isEmpty()) return; if (delta.y() > 0) { _currImageIndex -= 1; if (_currImageIndex < 0) { //_currImageIndex = 0; _currImageIndex = _pSeriesData->images.size() - 1; } } else if (delta.y() < 0) { _currImageIndex += 1; if (_currImageIndex >= _pSeriesData->images.size()) { //_currImageIndex = _pSeriesData->images.size() - 1; _currImageIndex = 0; } } _pSlider->setValue(_currImageIndex); } void DicomView::setCurFrameItem(int value) { if (_pSeriesData == nullptr || _pSeriesData->images.size() == 0) return; _currImageIndex = value; updateView(); }